LOCATION WOOLSEY NV

Established Series
Rev: LNL-TEB-GJS-JBF
05/2016

WOOLSEY SERIES

The Woolsey series consists of very deep, well drained soils that formed in alluvium and lacustrine sediments derived from mixed rocks. Woolsey soils are on fan piedmonts. Slopes are 2 to 8 percent. The mean annual precipitation is about 125 mm and the mean annual temperature is about 11 degrees C.

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Typic Haplargids

TYPICAL PEDON: Woolsey fine sandy loam, rangeland. (Colors are for dry soil unless otherwise noted.)

A1--0 to 5 cm; light brownish gray (10YR 6/2) fine sandy loam, dark grayish brown (10YR 4/2) moist; weak thin platy structure; soft, very friable, nonsticky and nonplastic; many medium vesicular pores; strongly effervescent; strongly alkaline (pH 8.6); abrupt smooth boundary. (3 to 8 cm thick)

A2--5 to 13 cm; light gray (10YR 7/2) fine sandy loam, grayish brown (10YR 5/2) moist; weak thick platy structure; slightly hard, very friable, nonsticky and nonplastic; few fine roots; many fine tubular pores; strongly effervescent; strongly alkaline (pH 8.6); clear smooth boundary. (8 to 30 cm thick)

Btk1--13 to 23 cm; grayish brown (10YR 5/2) gravelly sandy loam, dark grayish brown (10YR 4/2) moist; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and nonplastic; few fine roots; common fine tubular pores; few thin clay films lining pores and as bridges between sand grains; few medium and large soft masses of carbonate and thin carbonate coatings on gravel; 20 percent gravel; strongly effervescent; strongly alkaline (pH 8.6); clear smooth boundary. (10 to 20 cm thick)

Btk2--23 to 53 cm; grayish brown (10YR 5/2) gravelly sandy loam, dark grayish brown (10YR 4/2) moist; massive; soft, very friable, nonsticky and nonplastic; few fine roots; many fine interstitial pores; few thin clay films bridging sand grains; few fine and medium carbonate filaments on undersides of gravel; 20 percent gravel; strongly effervescent; strongly alkaline (pH 8.6); clear wavy boundary. (0 to 30 cm thick)

Bk--53 to 152 cm; grayish brown (10YR 5/2) stratified sandy loam and gravelly sandy loam, dark grayish brown (10YR 4/2) moist; weak fine and medium subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; few fine roots; common fine tubular pores; few fine carbonate filaments; strongly effervescent; strongly alkaline (pH 8.8).

TYPE LOCATION: Pershing County, Nevada; approximately 11 miles south of Lovelock, about 2,l00 feet south and l,600 feet east of the northwest corner of section 22 T. 25 N., R. 3l E.; USGS Wildhorse Pass 7.5 minute topographic quadrangle;latitude 40 degrees 1 minutes 17 seconds N and longitude 118 degrees 29 minutes 22 seconds W;
WGS84 Decimal Degrees latitude, longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Intermittently moist in winter and spring, dry from May through October; typic aridic soil moisture regime.
Mean annual soil temperature: 12 to 14 degrees C.
Depth to Bt horizon: 13 to 43 cm.
Other features: In some pedons, lacustrine sediments are evident at some depth below 100 cm.

Particle-size control section - Clay content: 8 to l8 percent.
Rock fragments: l5 to 35 percent, mainly gravel.

A horizon
Hue: 2.5Y or l0YR.
Value: 6 or 7 dry, 4 or 5 moist.
Chroma: 2 or 3.
Structure: Platy, or horizon is single grained.
Consistence: Loose, soft, or slightly hard dry.
Effervescence: Slightly effervescent or strongly effervescent.

Bt horizon
Hue: 2.5Y or l0YR.
Value: 6 or 7 dry, 4 or 5 moist.
Chroma: 2 or 3.
Structure: Subangular blocky, or horizon is massive.
Clay films: Few or common, as bridges on peds or lining some pores. Effervescence: Slight or strong.

Bk horizon
Hue: 2.5Y or l0YR.
Value: 6 or 7 dry, 4 or 5 moist.
Chroma: 2 or 3.
Texture: Stratified sandy loam through very gravelly sandy loam.
Clay content: 3 to l0 percent.
Rock fragments: l0 to 35 percent, mainly gravel.
Structure: Subangular blocky, platy, single grained or horizon is massive.
Carbonates: Few or common carbonate filaments.
Effervescence: Slightly effervescent to violently effervescent.

COMPETING SERIES: These are the Brinkerhoff, Chacoan, Delp, Enos, Glotrain, Granshaw, Mayqueen, Shiprock and Wallson series.

Brinkerhoff soils have gypsum at 50 to 75 cm. Chacoan soils are moderately deep to sandstone bedrock. Delp soils are loamy fine sand, or sand below the argillic horizon. Enos soils have a paralithic contact at depths of 50 to 100 cm. Glotrain soils are moist for 10 to 20 days cumulative from July through September due to summer convection storms. Mayqueen soils are noncalcareous. Shiprock and Wallson soils have noncalcareous A and Bt horizons, and contain less than l5 percent rock fragments in the argillic horizon.

GEOGRAPHIC SETTING: Woolsey soils are on fan piedmonts. These soils formed in alluvium derived from a mixture of igneous and sedimentary rocks and lacustrine sediments. Slopes are 2 to 8 percent. Elevations are 1,190 to 1,280 meters. The climate is cool, arid with hot, dry summers and cool, moist winters. The mean annual precipitation is 110 to 150 mm; mean annual temperature is 10 to 12 degrees C., and the frost-free season is l00 to l30 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bluewing and Mazuma series. Bluewing soils have particle size control sections that are dominantly loamy coarse sand or coarse sand with 50 to 80 percent rock fragments and lack an argillic horizon. Mazuma soils lack an argillic horizon.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained, slow runoff; high saturated hydraulic conductivity.

USE AND VEGETATION: Rangeland and wildlife habitat. The present vegetation is mainly Bailey greasewood, shadscale, halogeton, and pepperweed.

DISTRIBUTION AND EXTENT: North-central Nevada. MLRA 27. These soils are not extensive about 2,200 arces have been mapped.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California

SERIES ESTABLISHED: Pershing County, Nevada (Lovelock Soil Survey Area), l957.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to 13 cm (A1, A2 horizons).
Argillic horizon - The zone from 13 to 53 cm (Btk1 and Btk2 horizons).
Particle-size control section - The zone from 13 to 53 cm (Btk1 and Btk2 horizons).

National Cooperative Soil Survey
U.S.A.